Flash recommendation for Contax N1

I'm just beginning to realize that the Contax TLA 20 flash on my N1 is not working (well, it works...just not with the N1). I suspect that I need something with either TTL in the description, or something with 5 contact pins on it (which is what the N1 has on its shoe). Would anyone have any suggestions?

(I'm fairly ignorant about flash, since up until now, I've usually dealt with light-challenged environments by taking along a tripod...or a Sony A7s)

I may have solved the problem. I went on ebay and looked for "contax tla flash". Of the very many options available, I simply looked for those that had 5 contact pins. That narrowed it down to just the TLA 360. And since the price was right (about $75 CDN including shipping from Japan), I went for it.