Looking to buy a laser for my wife's model 36. In your opinion what is the best choice at a reasonable price and where can it be purchased? I am considering a Crimson Trace.

Crimson Trace makes an excellent product and they back it up with great customer service

I just put a Crimson Trace LG-105 on my old model 36. Works great, very intuitive to use. This is the boot-grip sized model, made from hard plastic. I wouldn't want to shoot 200 rounds at one sitting, but it's OK for a box or so. I bought it brand new off ebay for $155.

My laser arrived only for me to find out I have a square but model and Crimson Trace does not make one for this style My fault.
Looks like I have to send it back, pay shipping and a 15% restocking fee. ouch!