Hi,
My condo was built in 2004 and still has the original Alcan windows installed. I just replaced the 5/8" top sash guides (which you provided, 18-166) on 2 of my windows and I noticed that the weather stripping at the bottom of the windows was completely dry rotted so I need to replace that. However, I can't find the weather stripping on your site. The weather stripping is a black vinyl or rubber strip which snaps into the bottom of the windows. Do you have that item? Let me know. Thanks.