I think I've put this post in the right section, if anyone thinks different and that I may have better luck elsewhere please let me know and I'll see if a mod could kindly move it...
I have a Weiserlock Powerbolt 1000:

I thought I was buying it with regular tumbler, but when it arrived I see it's Smartkey! I need to have a regular tumbler as I need to master key it but I remember hearing with the kwikset models (which I believe are identical?), a regular replacement tumbler won't fit and you have to drill out the bracket on the back piece of the lock.
My question would be whether anyone knows of a tumbler that will fit (both size wise and aesthetically) which I can put into this lock and be able to master?
Thanks!