4G2F20

I've got the now discontinued (I think) Stoptech rear bbk. I'm trying to figure out what caliper to use as parking brake. I still drive the car on the street and I know at some point I'll forget to leave the car in gear. I've been sitting on this kit for about a year now I need to get it on the car just to complete this phase of the project.

Im hoping there are some members here that can point me in the right direction.
I know they sell a kit but I sent a couple of emails to Stoptech to inquire because it's not listed on the site and it requires st41 caliper and I have the old st22 caliper. I thought about tracking down the st10 caliper and making a bracket and cable sort of like the ones for the nsx.

This is sort of the state I'm in. I'd like to make it all happen but next Friday if possible.