Is there no such thing as a roomy full dress sporran?

[OC Richard]

It just seems that dress sporrans in general, with their shallow gussets and generally small dimensions, are not very deep, and not very roomy.
...a full dress sporran with a capacity more like a basic day sporran...

I'm a little puzzled by the way you worded that, because, at least with the traditional canon of sporran styles made by the large Scottish sporranmakers since the 1920s, Day and Evening sporrans have exactly the same body dimensions and gusset design. (The exception being the "Rob Roy" design which has a huge pleated pouch.)

So, I have a fur Evening sporran and a leather Hunting sporran by the longstanding maker Nichol Bros Bankfoot, and both share the same body design, with wide gussets, and both are quite roomy. Ditto with various sporrans from Scott & Son, another longstanding maker. (I believe both makers are now gone, but there sporrans show up on Ebay all the time.)

For even more room, there's a style being made in Scotland today with a somewhat oversized pouch, around 6 1/2" wide and 10 1/2" long. It's the style introduced c1980 for the OR sporrans for the kilted Scottish regiments. You can pick these up all the time on Ebay for $200 or less, because with the creation of The Royal Regiment of Scotland these sporrans are obsolete in the military.

Here is one on Ebay right now; note that these sporrans always have that curved plain chrome cantle, and come in black hair (Queens Own Highlanders, Argyll & Sutherland Highlanders, HLI, Lovat Scouts) and white hair (Black Watch, Gordon Highlanders)

http://www.ebay.com/itm/Scottish-ARG...item2324d023a4

You can also pick up the current Royal Regiment of Scotland sporrans, some of which have that same big gussetted body, while some do not.

This style is also being made with a goathair front for a nice Edwardian look. Here's a rather pricey one on Ebay right now. I've seen similar goathair sporrans, with the same big roomy body, go on Ebay in the $200-300 range

http://www.ebay.com/itm/SUPERB-Scott...item232572ce9b

And here's the same style, huge roomy body, with a fox full mask, also quite pricey

http://www.ebay.com/itm/SPECTACULAR-...item2322d59e28

Anyhow I bought one of those goathair sporrans on Ebay for around $200, took off the ugly modern cantle and put on a lovely vintage Edwardian cantle. This is the sporran I wear whenever I put on the kilt. It can hold wallet, keys, phone, camera, and even a bottled water. Here it is