I've been doing my own for a couple of years now using the silver
solder method others have suggested. I made my own jig using a piece of
angle steel and a few screws and washers to clamp the blade.

Before going this route broken blades got thrown out. Now I just
re-splice them until they dull.

Coil stock can be had from a numbe of sources. I use silicon steel from
R&D Bandsaws (www.tufftooth.com). They also sell the supplies you will
need for splicing.