Yes, as the others have said, Sealskin is bad.

However... I vacationed in Anchorage over the summer. The native Alaskans (Eskimos and such) are legally allowed to continue living as their ancestors did. In other words, they are legally allowed to hunt whales, seal, and such.

They are also allowed to craft items from seal skin and sell them to tourists. (I almost bought a seal skin thimble, just because it was seal skin.) I'm pretty sure there is a limit set on the amount and such. I'm not sure what it is exactly though.

Anyway, my point is that it may be possible to obtain a seal-skin dress sporran if you could pull some connections with the natives. Again, I'm not sure whether or not it would be possible for sure, but it's a thought, but if you're willing to go to those lengths it might be worth a shot