Do they still make lambskin condoms?
Yes, but they're pretty much useless for male-male sex.
While the natural skin (actually intestinal lining) condoms are more sensitive than latex condoms, they are porous. The pores in them are small enough to block passage of sperm cells and thus to prevent pregnancy, nut they're large enough to pass HIV and hepatitis B virus. The reason condoms are used in male-male sex is to prevent transmission of sexually transmitted infections–and since lambskin condoms are not effective at that, they're pointless.
Some guys have a condom fetish, such as filling up condoms with cum or whatever. A lambskin condom could be used for that, although again they are porous and would eventually leak. But the bottom (!) line is that they shouldn't be used if one is concerned about preventing infection.