Hi Giovanni, dimensions for the SCS200 are at: http://www.trojanbattery.com/pdf/datasheets/SCS200_Trojan_Data_Sheets.pdf

Our SM 378 is the 2003 model and those 12 batteries fit perfectly. The ones in there now were installed Sept 2011 and are still OK after approx. 40% connected to shore power. (less cycles). Do I like these batteries? So far so good, I had one fail but it was easy to replace as it is a common size. I hope to replace the bank with the same ones when we reach Singapore next year. (currently in Fiji). Sorry I cannot advise the best shop to go to, perhaps try your luck on the internet.

Best of luck

Mike Gough