You might take a look at
www.ch4d.comThey sell all kinds of swaging supplies including pistol bullet jackets of various lengths. They do not have 41's listed but they do have several lengths of 44's and they sell a jacket reducing die for the 41 for about $60. It is an axtra step but should work just fine.
I spoke a bit too soon, after a bit of research I found out that the most common thing to do is to use 40 caliber jackets and swage them up to 41 in the core seat die. It is a small step up and will provide an excellent grip on the core by the jacket. It also eliminates the need for the $60 jacket draw die.
CH sells 40 caliber jackets in several lengths for right around $58 per thousand. pick your length and make 1/2 or 3/4 jacket bullets.
Joe