Kifaru makes a metal plate that goes underneath the legs for a flat surface. I am not sure what seek outside does for their stoves. If you look at the kifaru web-site, you can see pictures under the smith cylinder stove if I recall.
I just bought a Cimarron with the Med stove. I also bought the medium utility tray to keep it afloat better during winter trips. I'll be headed out for a 6 day trip to break it in over Christmas, I'll let you know how it performs.
A piece of aluminum flashing from a hardware store would be a good lightweight way to do it. I've made a number for wood stoves and smaller camp stoves for snow camping. Aluminum is fine in this use because it's not getting enough heat to melt it, whereas you see titanium or SS used in every other part of a stove system. Aluminum flashing is probably going to be as light as titanium and way cheaper.
I just wanted to get back to you after my trip in the snow. Well there wasn't much of it, I never ended up using the utility tray because there was only a couple inches that ended up melting away after and hour or two. Over MLK weekend I have some time off and plan to head to where its deep and steep. I should be able to test it out there and I'll get back to you.
The older Ti-Goat stove I have came with a simple piece of flame proof fabric for underneath. I've used it under the stove in the snow, and it floated it just fine for one night stops. It doesn't transfer heat like metal would, so perhaps there is some advantage to that. Rolls up and packs away with the stove.