There are plenty of products out there, it's just a shame that they're all scams!
You've already discounted minoxidil, which is the only approved topical. I'm not personally a fan of minoxidil, but there is a study on PubMed (Comparative efficacy of various treatment regimens for androgenetic alopecia in men Khandpur S, Suman M, Reddy BS. J Dermatol. 2002 Aug;29(8):489-98) which says that, of a range of treatments, "the best results [were] recorded with a combination of finasteride and minoxidil". Bryan Shelton has compared the hair counts in various trials of Propecia, Avodart and minoxidil and found - surprisingly - that minox came out on top in the regrowth stakes.
Seriously, if you've got money to burn, and you're really serious about improving your hairline, you should look into a HT. I've seen some impressive work at the temple by North American-based surgeons like Armani and Sanusi Umar.