I bought two Model Ms online for really cheap ($30 for the pair) and they appear to be terminal boards ("new line" instead of "enter" as well as other interesting keycaps, which I love lol, and a terminal jack/cable). I was wondering what the cheapest/easiest way would be to convert it to USB or PS/2. I don't have a preference for either as my desktop supports both and that's the only place I see myself using a Model M. I'm in Canada so I'd prefer to be able to buy stuff from ebay.ca or amazon.ca, though if I really have to I can order stuff to a P/O box in the US. How should I go about doing this? I'm comfortable with soldering and whatnot, but I don't have a heat gun or anything, just an iron. Thanks!
tl;dr: What's the cheapest way I can convert a terminal Model M to USB or PS/2? I'm in Canada.