Who is the best retailer of these interlocking foam pads. Some of them seem excessive for what they are as far as price goes.

wow nobody huh?

You can get them cheap at Five Below or Harbor Freight, but they're not specifically made for RC tracks. You just have to ensure you get the foam without the faux diamondplate pattern.

I seen some locking foam matts at lowes but I didn't get the price

So you guys are just making your own instead of paying the crazy prices. Is there a thread for diy like myself on rctech?

Honestly, when you price out similiar sizes of the foam mats (including shipping) its not too much of a difference compared to the RCP layouts (depending how bi you go).

Harbor Freight, Lowes (even ebay!) have what you are looking for. Remember, its a niche for the foam plates so cost is higher normally.

Wesellmats at Amazon. There is a 96 sqft bundle for $60.