Any Empty Open-sided Auto Carriers out there?

If these exist, i would greatly appreciate item numbers, so that I can look on various auction sites for them.

We run O-31, so 15" is about as long as we want to make the cars.

I thought about the Lionel postwar with ugly cars on it, but those are usually sold with the postwar ugly cars.

Would 6-9123 or 6-9281 fit O-scale cars?

Would a vat car --without the vats-- fit O-scale cars on the bottom row?

I purchased a few off ebay.
The Evans 4-car auto loaders (including the LCCA 2014 auto loader 6-58584) by Lionel do not fit Menards Sweptsides on the bottom row.  They (the Sweptsides) are too tall for the end ledge by a fraction of an inch--they would fit if i took the tires off, or bent that lip down, but I don't want to do that.
The Menards Dodge Power Wagons are too wide for the lower level.
Plymouth Furys fit perfectly.

I think that Ford Panel Vans also fit perfectly, but I do not recall.

I then purchased a truckless and car-less 4-car MTH auto loader (with 8 chocks and rubber bands). This fits all Menards 1:44 $5 Denver Die Cast cars & trucks very well indeed on both the top and bottom levels.

interesting,

I redesigned the Menards open autoloaders in acrylic because the pressboard Menards uses breaks,

the car base I used was the 14-3/4" flat car. I laser cut the end truss frames and 2 floors for the vehicles. other parts were 3D printed.

I intend to post the completed car soon.

I look forward to seeing it.

note the end car-to-car ramps that flip up to secure the vehicles and down to allow them to move across car to car

Looks like it's coming along nicely.

I have four Auto Carriers and only one came with cars.  All were purchased at train shows, so they may be a good source of car-less Auto Loaders.

Charlie