When I rebuilt mine, I could not find a decent used one so I had to resort to an aftermarket one off of ebay. It is not too bad, but no badge on it. If you absolutely want an OEM, you’ll have to find an old 034 in a swap meet and get it power coated.
This is my old saw when I was a teenager and sold firewood with my Dad for some money. It’s an early 80s model, and does not adapt to the new Stihl clutch drum kit so unless you want to find out the hard way, like I did, you might want to check the IPL and what you have on your saw now. The new version’s cage bearing is bigger and does not allow the e-clip to easily slid on. Oh you can force it on, but it wont be long after you crank her up that you needle bearing will be at your feet.