I have both a P/S and Alt UDP
P/S from the SHOShop kit & Alt from a 4.6l Mustang kit.
Both are very straight forward to install; just a little time consuming. I recommend air tools for the Alt!
I'm surprised in all this time no one has ask or SHOShop didn't offer the P/S pulley by itself???
The Alt pulley may be had the same way from it's respective manufacturer when contacted with a group buy situation???
Who knows if it's not tried...