There was a design in the gallery before. Its a bit different at the rear from FP's or MOW's new one... but its close enough for a start.
The thread you posted is for MOW's old model flamethrower. Look for the thread for his 2010 ESB guantlets. The new version matches the screencaps and reference material very closely in shape. FP's also does too so look for his latest thread on his guantlets. (2009?)