Gentleman's Face Care Club Bergamot and Neroli cheap on eBay. Lathers very well and a decent scent. I have it and like it.
Tcheon Fung Sing have a Bergamotto Neroli - don't know if GFCC buys in a TFS product, since several other companies like Omega also get TFS to make their soaps. Anyway, the TFS soap gets very good feedback to that's also a recommendation.
Eufros Gea contains bergamot and neroli - that's a very nice soap which you can order from Spain.
If you're after the neroli part of it, then a really good one is Grooming Dept. Neroli di Bois, probably my favourite neroli. That's a USA soap though.
In terms of UK artisans OSP has a neroli as well. Also P&B Pall Mall, but that's more complex.