Newbie, finding an uncut deck lid (or front hood, either) is difficult and expensive. Two suggestions: ALL the vendors have crash-damage cars laying around. Call them- many are trying to earn a living and do not have time to play on the Web with forums or e-mails.
Second- most vendors sell fiberglas or other copies of steel hoods and decklids, which are cheaper and do not put the car into this situation when doing engine mods. If you simply can't find one at a price you can afford, buy a 'glas one and have it painted until a real-steel part shows up.