Good evening. I am wondering if any of you own the REI alcove shelter and have had to replace or fix a HUB? Apparently the parts are not readily available and I was looking for some creative solutions. I have looked at possibly LASCO 1/2-in Dia 90-Degree PVC Sch 40 Side Outlet Elbow from Lowes. Any of you experienced campers have any suggestions or fixes that you have tried already? Thanks.