Replace main slide out topper for 2019 Greyhawk 29mv

[billgeo]

I destroyed our main (dining room) slide out topper on our 2019 Greyhawk 29mv and need a replacement.
I've searched the Jayco forums for info on anyone replacing the main slide out topper and found a number of posts but none specific enough to answer what I'm looking for.

The reason for my concern is researching and chatting with etrailer.com it seems I must use the 145" "Solera RV Slide-Out Awning - 145" Wide - Black". The factory installed topper I destroyed was only 141" and I'm unable to locate one only that long.
Questions
Will the 145" be problematic for my rig?
Has anyone performed this replacement to their 2019+ on the Greyhawk 29mv, if so, what was your experience?

Thank you for any insights.
Bill