Does anyone have anything for it?  Some cybernetics can be 'orkified' easily enough, but surely there's some cybork bits out there people have come up with that don't have a normal equivalent.

1- Get a cybernetic arm.

2- Replace hand for Power Claw

3- Get some Orky Upgrades

4- ?????

5- Profit

My two cents. =)

Generally, I'd expect combat oriented implants to be relatively common, such as enhanced armor plating and the like. Unlike subdermal implants, these would be obvious and possibly directly grafted onto the skin. 

simply remove the damaged limb (if already gone ignore this step), take wanted object, add buzzsaw/massive exhaust port, jam into space, wire into the brain. There is your orky tech, note this is in no way reliable

My favourite thing about the Orks that made me a lifelong Boy, and the thing that kept me collecting after the initial surge of wonderment at the hordes I could field, was the Mad Docs. The lines"The unfortunate patient may wake up from having a bad tooth removed only to find he's been given a brand new set of mechanical lungs that let him breathe underwater!" struck a chord, and really emphasize that Orks do exactly as they feel at any point in time, and that is limited only by the brutality and crudeness of your mind.

as for specifics, just allow an ork to get a 'inbuilt anything' to represent both the crazed doc's ability to mix and match parts, and the ork physiologies ability to accept almost anything as a graft!

for example, allow an ork boy to get a inbuilt ammo hopper for his gun inside his chest, or allow a inbuilt exterminator cartridge to be placed inside his fake arm, and why stop there why not simply weld him inside a tin can and make him a killa khan!

 Orky specific bioniks?  Pretty much think of any large piece of machinery, preferably with a diesel stack, and try and think of a way to make it a useful augmentation.  Orks don't tend to go for subtle so much.  Unless you count the bionik arm with a face-eater squig in a cage.  It's not hidden, but it's often a nasty surprise to find out it can be released on command.

Zarkov N said:

That one was always my favorite!

The Mek-Boyz from the Kult of Speed can set you up with lo-rider suspension, kustom rims, streamlined fairings (red, of course!), air-intake skoops and fluffy dice!

BlackSpike said:

These are, of course, personal upgrades, They can take a look at your vehicle, too!

BlackSpike said:

The Fluffy Dice are something of a no-go option - if they're hanging down from the Ork's helmet, they're liable to distract the Ork... at which point, he may attempt to knock them away, and failing that hit them with an axe or shoot them off.

More Ork fatalities come from fuzzy dice implants than from vehicle collisions.

You all have made me proud with these responses.  They amazing idea.