I love the Lightblaster, but as a Nikon shooter I don’t have any Canon EOS mount lenses lying about. Lightblaster will sell you an EOS to F-mount adapter, but quite frankly (do I owe Frank D a fee every time I use that phrase now? 😛 ) that thing is dangerous: it has no release lever and you have to practically prise it off your lens.
You could try trawling eBay for old Canon lenses, but here’s the thing: Canon changed their lens mount in the 1980’s to get AF working properly way before Nikon, and well anybody tbh – that’s why every sports shooter 
on the planet still shoots Canon today, but the consequence is that there are no old Canon EOS lenses (ie old enough to be bought at junk prices).
Plus, you really need a wide aperture lens to use with the Lightblaster – or you’ll just lose most of the light.
These Yongnuo 50mm f/1.8 lenses are £35 – or around $50. and they have AF! I have no idea what the image quality is like, and I never will as I don’t own any EOS bodies, but for £35 I’m happy for it to hang off the Lightblaster, and it weighs nothing.
In the USA: http://www.light-blaster.com/
In the EU at Frank Doorhof’s shop: http://www.frankdoorhof.com/store/images/lightblaster-2.html
..and in the UK at Inspired PhotoGear http://inspiredphotog.com/light-blaster/