From what I've been able to see, the following is the L vs. S mount list:
2.1cm f/4 - S
2.5cm f/4 - S, L
2.8cm f/3.5 - S, L
3.5cm f/3.5 - S, L
3.5cm f/2.5 - S, L
3.5cm f/1.8 - S, L
5cm f/3.5 coll - S, L
5cm f/3.5 rigid - S, L
5cm f/3.5 micro - S, L
5cm f/2 coll - S, L
5cm f/2 rigid - S, L
5cm f/1.5 - S, L
5cm f/1.4 - S, L
5cm f/1.4 Olympic - S
5cm f/1.4 Millenium - S
5cm f/1.1 - S, L
8.5cm f/2 - S, L
8.5cm f/1.5 - S, L
10.5cm f/4 - S
10.5cm f/2.5 - S, L
13.5cm f/3.5 - S, L
Anyone know of any others?
::Ari