Check out one of the Daredevil models on N2NBodywear.com. Maybe what you are looking for.

One possible problem with Skinzwear is that the back coverage is less than it sounds in the descriptions. For example, Sunseeker is described as half back, but is just wide enough to cover the crack and no more.

You might want to take a look at zungas.com aka, Arroyman. They do some great suits. Not got any of their bikini styles yet but their thongs are very nicely made.

String Swimsuit
 

Look into http://www.andreascahling.com/mens-posing-suits.aspx or Google Jelly Swimwear. Both have been great for me for many years. Jelly swimsuit are women's bikini bottoms, but are stretchy in the front for the comfort and fit for any size guy. I like the very narrow sides and the American and the Euro bottoms. Gives a great tan and receive a lot of compliments from the girls.

Would try skinzwear or prevailsport, sorry if anyone already mentioned.

https://drenalin84.tumblr.com/post/1...ine-stringtime
I tried these out last Summer although I was initially hesitant and skeptical simply because they seemed more designed as underwear but I was pleasantly surprised.
They are very revealing but, if 'string' style you're looking for, than that won't be a concern.
They greatly reduce tan lines and hold up very well after multiple use in water and even retain their color after prolonged use in chlorinated pools.
I bought these off EBAY from a Chinese company for less thamn$4.00 USD with free shipping. Very cheap but I've ordered a couple more as I liked them so much.

I really like that bikini. Nice pattern and fabric looks quite stretchy. Do they have solid colours?

Not sure if the exact seller I purchased the blue camo from has solid colors but I've seen the exact bikini in solid colors offered from other Chinese companies.

Thanks Dave! That is exactly what I want! 😀