fit

I'm trying to find a second tank for my bike and I'm pretty sure I won't find an xs400 tank in Ukraine, neither drop style nor the boxy one (which won't fit anyway). Does anyone know if there's any other model I could try? Preferably it has to be a direct fit or at least with very minor mods...

First time buying a motorcycle battery and blown away by the multitude of choices. I like the idea of a gel battery, will this fit my Maxim? http://www.amazon.com/TMS-Motorcycle-Maintance-Fourtrax-Kawasaki/dp/B0051VMIC6/ref=sr_1_3?ie=UTF8&qid=1380830572&sr=8-3&keywords=YTX9-BS+AGM I...