So have you
seen this yet? It is really all you need to be able to run the hydraulics for your L3800.
If you want to build your links yourself, buy 2" dia cylinders with a 10" stroke for the top link and a 4" stroke for the side link and just cut the ends off of your OEM units and weld those onto the hydraulics. That is about as inexpensive as I can see you doing this, not the best way, just the cheapest. Be careful about what valves you purchase, some leak quite a bit more than others and make for other problems. Just because it may say "Made in USA" does not make that product good.
Sad but true.