I am looking for filters for black & white use on a Schneider 72mm SA-XL lens. I have had a couple of B+W filters on backorder from B&H since April, with no ETA in sight. I'm looking for the usual suspects -- yellow, orange, red, green, etc. I leave for a trip in 2 weeks and need to find something in stock, new or used OK. All help appreciated. Thanks much.