There are kits that, with work, you can use to replace an mr11 halogen bulb.
www.cutter.com.au has two kits, one for low voltage systems, and one for high voltage systems. They aren't exactly cheap at about $100, and you will need some knowledge of electronics and soldering. On the other hand, the kit is a relatively inexpensive way to give an older halogen system the same or better light output as a Dinotte 600L. The kit you mention probably is a flood, and not a spot, and in any event, uses lower powered leds and not the eye blinding, paint scorching sort used in the dinottes.