Replacement parts for Empire Pacific Alum Wnd 1992

A handy person from Oregon says:
Hi, thanks to your great site I have found what appear to be the parts necessary to repair the aging aluminum windows in my house. It was built around 1992 and has 'Empire Pacific' double paned aluminum windows. So far I have identified the balancer required as S351-21
Also what appears to be the correct seal: 58-045

However there is one more failure-prone part that I need, it's the sill 'bearings' or guide slides that are small u-shaped extruded clips that clip in little slots on the side of the windows to prevent metal-metal contact when opening and closing, and push the window toward the seals a bit. I've attached photos for you to see. Is a bag of these available from you?

Secondly, I can't see an easy way to slide out the old seals. Are cuts to the ends of the channel required?

Thank you
A customer submitted photo of their window sash.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting! I'm having a little trouble recognizing these parts. If at all possible, could you send me another photo of the top black guide and the "J" guide?
A handy person from Oregon says:
Thank you for your response. Sure, here are some more photos. Note: None of the black top guides need to be replaced, just the J clip guides.

Also, to the other question, I plan on ordering balancers and seals from you, when installing the seals is it common to have to cut a slot in the seal channel to facilitate removal and insertion?
A customer submitted photo of a top sash guide.
Profile picture of Paul
Paul from SWISCO responded:
Thank you for your patience in this matter. We are currently still researching a possible replacement for this "J" clip face guide. I will let you know as soon as I have more information!

In the meantime, however, please see our 26-091 guide. Do you think this may be a possible alternative? Let me know!

As for the weatherstripping, the sash you have is screwed together. Therefore, there is no need to cut in the channel to remove or install new weatherstripping. You should just be able to take the frame apart to slide out the old and put in the new.
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