hi joel
depends a little on what year/model a/s was the donor moho....
IF you want an exact a/s part.
these gas shocks are rated by pounds they can support....
so how much does your bed/platform weigh?
camping world carries them and ANY rv dealer who sells/services any moho brand...
can order a suitable shock...
at the airstream site the moho bits are listed by year, back to 1998 or so...
Airstream :: Customer Services
there are also instuctions on using the parts catalog, hyperlinks and downloading....
but again any rv dealer will have a parts book and can order a suitable lift/shock...
as a side note, the model used in my 34/queen will barely support the bed and sheets....
add a comforter and memory foam pad, 4 pairs of shoes and a tool box or 2....
and it all comes right back down....
cheers
2air'