15mm rails, clamps, and handles can be found just about anywhere. For cheap dslr rig shoulder pads, there's not a huge variety yet. Here's a Dual Purpose shoulder pad that can be used on a set of 15mm rails to throw your rig over the shoulder, or for smaller Target Shooter style setups the pad can be repositioned into more of a Gun Stock.
With more and more small HD video cameras coming out every month, more and more companies are making lightweight stabilizers. Another mini rig are these little black and orange mini shooter rigs just starting to come around. John a.k.a. YouTube member TheDurko11 gives us a look at the unboxing and shows that even the clamp knobs are metal [Thanks John]. Redrock Micro has also been lining up lightweight stabilizers with their line of Nano Rigs (found here).
These new rigs come with one handle, adjustable camera stage with quick release plate, and adjustable shoulder / chest pad. Mostly metal and stainless steel, color scheme (not blue this time) designed after the World Series Champions - Go Giants! Found Below.
[Update] Seller has re-listed the item (below) and at first glance you'll see an incredibly high marked up price. The deal is that you can make an offer of $89 US dollars, mention this blog, and the offer will be accepted. Offers that don't mention this blog will not be accepted. One other important piece of information is that this listing is a 'Pre-Order', and the new inventory should arrive sometime this week. This auction comes from across the pond, perfect for the UK buyers.
[Update] Alternate Listing for these little Magic Rigs (Also a Pre-Order) listing
DSLR Magic Rig Orange / Black