Seeking LIPO battery source to replace battery used in a Kickstarter Solar charger project. Vendor (Bootstrap) seems to have gone away and battery replacement not available. Original was a 3.7v, 6000mah 2P with a female Tamiya connector. (I suppose it was 2 3000mah batteries wired in parallel.) Dimensions are approx. w45m, h58m and thickness about 6mm. Dimensions not critical for replacement. Battery labeled H92485 if that helps identify a source. Not having luck searching Alibaba or similar sites for reasonably close alternatives.