Seeking Binding Cover Advice

As the owner of a new pair of (expensive) Dynafit TLT Vertical ST bindings with brakes, I was disappointed -- but not especially surprised -- that the $9 Rossignol binding cover I purchased at REI got blown to hell after a couple of outings involving Interstate speeds.

I returned the Rossignol bag and have searched unsuccessfully for a replacement.  On the Internet, I've found essentially the same nylon bag with elastic ends and a crappy zipper with different brand names.  I found a ridiculously priced ski cover listing for $80.  With a bit of time and some creativity, I'm sure I could craft a homemade cover.

What protection cover suggestions do you have for skis transported via an exposed roof rack?

Thanks.

are dynafits really so fragile that they can't handle a ride on  roof rack? 

Yeah, I'd just keep them lubed and wipe the dirt/water off them when you get home and save the money. Or buy some cordura and sew in your own zipper/elastic and save some bucks.

are dynafits really so fragile that they can't handle a ride on  roof rack? 

For those in the business of making/selling crappy binding covers, the answer's an unequivocal "yes."

While they'd likely survive without a cover, given their high cost, I plan to baby them so they last as long as possible.  If driving around town with skis sporting binding covers proves I'm a noob, what the hell...

I use a bag that covers the whole ski. Don't need road spray on the ski bottoms either. But here we salt the road snow into submission. Ere the "Rust Belt"

Make sure you put your tips forward on the rack.  :