now that's a horse crush but ours are made of metal
I'd never heard of a "horse crush" either! LOLOLOLOLOL!! Then I realized you are from a different country and figure it's like horse trailer (US) and float (British?).
So, do you really mean like a palpation chute that full size horse vets, colleges, and large AI breeding facilities use or do you mean like an actual squeeze chute that would be used for cattle (large), sheep and goats(small)?
Here are several links of both permanent and portable chutes used for horse facilities in the US. The prices are a lot more than what the one site listed in AU is... There are a couple of Mini Horse suppliers that also have Mini sized stocks - maybe you could get in touch with them to get their info on sizing? HMMM - not finding any of them!! Not sure where they went...
http://www.priefert. com/ProductGroup/horse-equipment-49/horse-stock-325/ take out space between the dot and com
http://www.flyingwlivestock. com/horse_chutes.htm take out space between the dot and com THIS ONE SEEMS TO BE AN ACTUAL SQUEEZE CHUTE!!
http://www.purplewave. com/cgi-bin/mnlist.cgi?100519/4683 take out space between the dot and com For biggies, but you get the idea?
http://www.ntvdc. com/photos/horseinchute2.jpg take out space between the dot and com
http://www.squeezechute. com/ take out space between the dot and com
http://www.horsestocks. com/mobile.htm
http://www.montanawestwood. com/page2.html
http://www.hoffmannstables. com/reproduction/palpatingchute.html
http://peddicordquarterhorses. com/Odessa Animal Clinic Facilities/OdessaAnimalClinicphotos.html
http://sugarcreekranchmo. blogspot.com/p/miscellaneous-for-sale.html I LIKE THIS ONE!!
LOOK WHAT I FOUND!!!
http://www.ramblinroseranch.com/breedingchute.htm
And here is what I built... I put a solid pallet on the ground behind larger mares with a plywood sheet as a "toeboard" to keep stallion from falling off the front of the pallet, and could breed a mare that was up to 16 hh in this set of stocks. Now I have a rubber mat where the ponies can stand. Since I built this for the larger mares, I stood a 14.2 hand mare up next to the first post and measured to figure out where the other four posts would go. The vet can US, or do teeth. I can clip, bathe etc...
The mare pictured is 13.1 hh and the stallion that stood on the ramp to cover her here is 40". She was bred to produce 2 1/2 shetlands that way - then they figured out on their own when she was running with him after the 2nd colt born. We now a 3rd one!!