Someone with experience replacing these?

Got my 06 TRX250 torn down to powder coat. The rubber bushings are real tricky to get all out in one piece in a hydraulic press as thin as the metal collar is on the outside. I just took a torch and burned the rubber bushing out from the inside. Now I dont know how im going to get that thin walled collar out.

When i was checking online there arent any specific pictures for aftermarket bushing kits from alls balls or quad boss but they do sell them. My question is does the aftermarket kit even come with a new collar or are they just rubber inserts maybe? Which means I can leave the collar in. Interesting that you cant get oem replacements for these you have to purchase new arms with them preinserted.