We are also working on that, a universal ramp to put in any Lyman/Williams/Marbles/etc. front sight.
It should make the Mendoza peep suitable to the 48/52/54 family. Mendoza peeps are very strong and adequate for most purposes. Only drawback is that the windage adjusts inversely to most sights.
On the Rekord trigger, I am sorry, but I do not think it is a good idea. Go for the T-01 unit with it's two screws, it adjusts real nice.