Install kit too opening too big for HU

[Ctwith3]

I just received my Alpine ILX-W650 head unit for my 2006 Cayenne (I don't have the MOST fiber optic network or the Bose sound system). With the HU I purchased the recommended Metra install kit. My problem is that the opening for the face of the install kit is about 1/8-3/16
" too big In total)along the top and bottom of the HU, and 18" too big on the sides.
I called Crutchfield and they told me that the install kit is universal for my car, and the person on the phone suggested using weatherstripping to fill the gap, but Don't know if that is right, and I can't picture how to do this and make it look good. The guy on the phone at Metra suggested using felt paper, but I've seen felt paper loose it's stickiness/grip after a short period of time.
The guy at Crutchfield states that the size of the Alpine HU is the same as of their stereos. The CDR 23 in my car keeps dying so I need to get this done. What do I do?

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[Popwarhomie 5,000+ posts]

Send it back and get the Scosche or Pioneer kit.

 

[Firewalker]

Never had any good luck with Metra kits. Scosche has always been dead on correct. Look at Sonicelectronix for the right one as they should have Scosche in stock or the Scosche website also will give you the correct ones as well so you can then take the numbers to Amazon or eBay or wherever to buy it.

 

[1aespinoza 10+ year member]

What do I do?

You can also buy a flimsy black plastic binder, cut out the hole for the radio, and sandwich it between the Metra and radio. I"ve done this with ABS sheets, but binders are easier to cut and fit.