Perhaps you could find someone with the same model truck that wants the lift
and swap parts with him. Or you could check with your local 4X4 shop to see
if they have the stock parts you need left over from a previous lift
customer.

Are the blocks added on top of the factory one? If so then remove them and
you may have to cut off or replace the ubolts (they are fairly cheap). I
dont know what Year or model you have but my 99 had 3.5" blocks from the
factory in back. If they simply replaced the factory with 6" blocks then put
factory ones back in their place, takes about 30 minutes with air tools or
an hour by hand.
   Up front if they only put longer springs then put factory ones back in
place. The lifter should have put a tracbar relocator and dropped pitman in,
and if so then you have to replace those as well. You really need to find
out exactly what was done before we can give you an answer. If you can take
clear pictures then post a link to them I can tell you what was done.

If all you see are blocks in back and longer springs in the front, than that
may be a stock lift.  Mine has a 5.5" stock, and it would probably cost as
much to lower as others pay to lift theirs.  You need to get new front
springs, new pitman arm, new rear blocks, relocate the track bar, then make
sure your drive line geometry isn't messed up.  A good shop can do it, but
don't expect to pay just a couple of hundred dollars.
Drager

Maybe some drivetrain replacements too.