Not to mod your thread but it looks like you need to ask more questions in a different area of this forum. There you can get suggestions on who can modify a host for you. Btw, how much of the modding/assembly are you doing yourself? Are you doing drop-in plug and play or will you be doing some soldering? As for some quick references for hosts, go to oveready.com for surefire or wquiles or Jesus hernandez for mags. Another awesome one is fivemega. Cmacclel may have somethings you are looking for as well.