I've been on the lookout for a fridge slide that actually drops down. There's one usually advertised in the back of 4wd monthly called the Platinum gear drop slide.
It actually drops the fridge anywhere up to 300mm from it's normal height so it's particularly handy for mounting on the top of drawer systems, which I plan to do with a 60L Waeco. You could even bolt it to the floor and have it drop down 300mm from floor height.
I spoke to John from PG today and he has the first shipment coming in on the 7th of April ready for delivery. As it's a new product there's not too much info on it but there was a review of it in 4wd Monthly, issue 114 pg133-144. Website--> http://www.platinumgear.com.au
If you order before next monday you can get them for $449 + postage, after that they go up to $549. I asked about a group buy and he said he could work something out discount wise.
So if there's anyone interested let me know and I'll try to stitch up a deal. I know it's hard when it's a new product to see what it's like but if anyone has the 4wd monthly issue there should be a decent review of it in there. I haven't read it myself, trying to get my hands on it.