1P-LSD is closest. ALD is not an rc; it was possibly the active ingredient in Orange Suneshine.
There is ETHLAD, 1P ETH_LAD, AL_LAD and racemic LSZ avaliable on the public markets.
If you have good organic chem skills, you can make pro lad, MIPLA, LSB, LSP, SS-LSZ and homolouges of all the other lysergamides (so 1p-al lad, 1p-lsz, 1a-eth lad, 1a-pro lad, etc). All the n-modified analogs (MIPLA, LSB, LSP, SS-LSZ) can also be tweaked at the 6 position, giving stuff like eth-LAZ PRO-LAB, AL-LAP, etc. Other 6-subs would be interesting to prod at. butyl or longer and isopropil are duds but I bet ethenyl (2x bond ethyl), ethynyl (3x bond ethyl) and propynyl (3x bond propyl) would be good.
You can do crazy stuff. Think 1A-ETE-LAP (1-acetyl-6-ethenyl-lysergic acid 3-pentylamide).