Check out the Tricker's Group MTO thread.
The single MTO upcharge is kind of steep. I'm not sure I'd pay that for Comipel as you'd be looking at close to a grand.
If you can get a group to decide on a single style though, you can get the MTO for the regular production price. For cordovan you'd be looking at a big less than current Alden prices.
Also remember that Tricker's is more than the ever popular 4497/4444 country last styles.
Check out the 81 and 2298 lasts.
There's also C&J. There was just another group MTO for a whiskey Harlech. Those will run about a grand.
I think they said that was the last of the whiskey but brown remains an option. Not sure what the group MTO minimum is.
Check the Whiskey Harleck MTO thread in Classic Menswear.
Just posted in the Trickers MTO. Thanks to you and Ryden for all the info.