This is why you can only use DG23: [Contacts: Silver Alloy (DG13, DG43), Gold Flash, Gold (DG23)]
Gold flash is desirable for the small amounts of current that a mouse passes through it. If you use standard silver alloy you will likely run into problems of missed clicks or multiple clicks. Gold flash is reliable for lower (signal) amounts of current, while silver alloy is reliable for larger (power) amounts of current.
Also it should be pointed out that 140gf is not available on DG43, and 75gf is not available on DG13.
Why would you look for a DG13-B1AA? DG23 series are what fit into mice, and DG23-B1AA is what I recommended and gave a link to.
I have listed that I am interested in other Cherry DG series switches as well, chill down. I have particular interest in the DG13B1AA model simply because I have found it. The only difference is that it is rater for higher currents. It fits mice as well.
Edit: To be able to compare the feel of them, I am particularly interested in Cherry DG*3-C*** as well.
Edit2: Are Omron D2FC discontinued? Their specs are harder to find.
I mistakenly put "fit into" instead of "work with" in my last post, I have corrected it.
The C model Omrons are the Chinese ones, but people usually seem to prefer the Japanese ones though.
A this point, I don't care all that much about what type of pins they have either. They will work fine for testing to see whether I want them and if it is worth the effort getting the correct ones. I can probably make any of them work if nee be.
Yes, because you are direct wiring the switches in your custom housing any of the 3 directions of pins should be fine. But the straight ones are usually the cheapest and easiest to find in my experience.