In reply to Richard Horn:
> (In reply to Matt_b)
>
> Approaches to what exactly? They are useless on anything except hard snow (i.e. a piste). Plus of course everyone will think you are gay.
Although that's a pretty good description of Snowlerblades...
Some peeps do actually use the bigger ones (~100cm long) for approaching climbs, and later ski down with a snowboard (almost as ghey as snowlerblades... until they are smart enough to get a split-board).
Anyway, you're best option is to just buy a cheap "big" snowlerblade (ie. around 80 to 100cm long) and then buy some old Silvretta 300's/303's/400's/404's from (german) Ebay.de.
Unscrew the stock binders from the snowlerblades, pour some woodglue into the screw holes and then gently tap a golf-tees into 'em. Let 'em dry for a night, and then use a saw to cut the plugs flat to the surface of the ski. Coat the ends of the plug with instant glue. And then drill in the AT-binder (mount the forward-piece 1st, then attach the heel-piece using the lock and drill it's holes plus mount it), use woodglue in the holes and 3.6mm drill-bit plus drill the holes 9mm deep.
All this takes around an hour on two evenings.
Lastly, try to get some skins and cut 'em to shape of the base.