Pace tools.com
I bought a motorcycle lift model vml-1500 for around $1000.00 a few years back and love it. It is a great mx lift and has a rear wheel drop out so you can run through the gears. Also has 2 removable posts at the rear to hold the tunnel up. It has side extensions that bolt on to accomidate sleds and quads. It raises up very high and has casters to roll around. Also can lift with foot pump or pneumatically.
If all else fails go ask your dealer where they bought theirs.
As for locally, harbor freight is the only thing that comes to mind, but don't expect too much in the quality department.
good luck