Need to replace sash guides for non- tilt single hung vinyl window

Thanks for posting. This exact Top Sash Guide is one we've never been able to find, but we think the 18-009 can be used to replace it. The dimensions should match up nicely, with the sole exception of the "trim" on the top end of the guide. You'll have to cut that down with a utility knife in order to get the clearance necessary for installation. Make sure to wear safety gloves when you do this, just in case, and note that products cannot be returned for a refund after being altered in this way. Review the dimensions below to confirm the 18-009 otherwise matches what you have, and let us know if you have questions.

Detail of 18-009

Side view of 18-009

My pleasure. Let us know if you have other questions, and thanks for reaching out.