Bad news, nobody reproduces them. Your best bet is to find a nice used one here (used theyre still not exactly cheap per say), a broken one and use a parts grill to fix it, or the rare find nos one (that is just about made of unobtainium and you had better have deep pockets!) Sorry hate to he the bearer of bad news...
Got an NOS one listed. http://www.v8buick.com/showthread.php?229992-NOS-1972-Skylark-GS-Grille&highlight=grille
Thanks for the link Fred. I knew there was an nos one floating around somewhere, but the search function on my phone was not cooperating. Well, there ya go hansen. A few viable options for ya, not a repop like you asked, but some workable alternatives nonetheless!:thumbup: