I have a rather specific question. I'm building another trailer, but this one will have suspension for each wheel. I've been looking for a suitable (cheap) shock absorber for the purpose. something with a spring and damping. Ideally not more than 8inches long. Stroke of about 2inches. Compression achieved with weights of 80lbs.

In what field of human endeavour would one find such a thing?

So far the front shocks from ATVs seem closest (rear bicycle shocks seem to have little intrinsic stroke). I imagine the spring would have to be replaced with something softer, but the other characteristics seem to fit, more or less. However they generally seem too large for the purpose. I hear the 'shock' on the BOB Ibex(?) doesn't actually have any built-in damping. There are similar cheap, purely sprung shocks on ebay, but none have damping, which is really something I want.

Any suggestions welcome.

Regards,
AR.