Martelli. I should find a previous post and copy & paste it... They have redline direct specials a few times a year; the latest newsletter said one will be held before Christmas. Whatever items are being offered are generally 50% off. Sometimes it's a specific item, sometimes it's everything they sell.
Yes, their mats are pricy. Even on sale. But yes, you can iron on them. I've done it. Not consistently so before doing that, I'd contact them. The reason I don't is that I prefer a slightly padded surface (like what would be on a typical ironing board). While their mats are softer than some (Olfa, for example), they are certainly not padded.
You can also roll them and they do not warp when left in a warm car.
http://www.martellinotions.com/ On the bottom right is a link to sign up for various e-mail lists. You MUST check off redline direct sales. Possibly if you follow them through FB, too.