The iconic plaid bag

Just because I was curious, I Googled it and found this:

Nov 23, 2011, 8:43 PM - Re: What's Upd Doc? - Plaid Overnight Case #2
Exavior, I've been looking for this case for years. I'm a HUGE fan of the movie, and I always wanted one. I've looked everywhere for it. I figured if they were mass produced, one should be around somewhere. Finally, I got out the DVD and looked at the credits at the end. Props. A guy named Sal. I found him on Facebook. I sent him a message about six months ago, and a couple of days ago he finally answered. Here's what he said:

Plaid cases were originally a plain brown Vinyl case.
The night before shooting the Director changed his mind and decided he wanted something that would stand out more. The prop crew stayed up almost all night in the Property Masters hotel room with 77 spray and scissors making an unknown brand of cheap luggage Plaid

So....I researched the plaid. It looks like a "MacTavish" clan tartan. There are a few, so if you google it, you can tell. So it looks like I'm just going to have to find a similar bag and get out the scissors and "77" adheisive spray! Let me know if you find anything more out. I asked Sal what typically happens to old props, but he hasn't answered me yet. I contacted Warner Bros. a while back, but they didn't answer. Any you find out, too, please let me know! Jim

Very interesting.