I was told by someone that there is a Teshuva by the Seridei Eish where there is a discussion of weather wearing denim jeans falls under the category of Chok Akum.

My question:

1) Does this Teshuva actually exist? (I'm very interested in seeing it if it does.)

2) If it doesn't, are there any Teshuvos out by him or other poskim of a similar matter?

Note: this is a serious question. Really.