Personally I think this would be the way to go
http://maxamps.com/proddetail.php?pr...ULTI-TP&cat=34 For what you'll pay in shipping and materials for someone to make what you need you could prolly just get this and know its 100% right
RC-Monster RC8T 1515 2.5D/MMM/5s RC-M 4500mah
SC10 MMPro 13.5T 2s NeuEnery 5000mah
RC18T Mamba 25/5400kv 2s lipo + 6s NiMh