hahaha, you need to look to the american merkur guys. we are the masters of putting a t-5 into a sierra (merkur) shell. you can check out rapidogroup.com they make a mount specific to mounting a t-5 under a merkur. i have one on my car and it fit perfect.

i think BAT inc has them too, but not sure.

or you can get on merkurclub.com or merkursportcom and look for a user galaxie1. he makes mounts as well.