Acorn Brand Screen Door
Thank you for your patience during this incredibly busy season. I apologize for the long wait.
I agree that your old screen door roller appears to be a match for our 84-142, but I cannot verify whether it's the Brixwell part you mentioned. That's not a brand I've ever heard of, and as a general rule we don't have access to the records of other companies.
What I can tell you is that the 84-142 is a notoriously frustrating roller to work with. It is indeed very hard to snap onto the corner peg, but the bad news is that there's no trick or secret to get around that. It's just plumb difficult to work with. This is probably my least favorite door to work on for that reason.
I do think our 84-142 is the best part for the job in your case, I doubt you'll find anything better. Just understand that it's going to be difficult to install. Expect that you'll scrape a knuckle or two, but with patience and perseverance it should snap on.
Otherwise, we don't have any other options we can offer you. This is currently the only roller we sell in this design. If that doesn't fit, we have nothing else that will.