Thorfinn Sporrans are in daily use in the USA, Scotland, England, Canada, and Australia. Acceptance among discerning kilties has been rapid because of the service and quality they receive from TCS (see what my customers say). All Thorfinn Sporrans are numbered and signed.
TCS pioneered a unique approach to the need for multiple sporrans. With a Snap Flap(TM) sporran you have the ability to customise one sporran to go with as many kilts and "looks" as you like. Wait till you see how the tartan flap goes with a matching kilt. Not to mention leather that goes with red kilts and ancient colors.
Here are some examples of what can be yours.

Featured above is TCS #3, with interchangeable leather and tartan flaps . It is owned by Mr. Hamish Bicknell, Kilted Legend, Laird of Lochaber, resident of West Sussex, England. Hamish is literally known around the world for his taste in kilts and accessories.

Mr. Bicknell with his friend David enjoying a get-together in their Thorfinn "Tartans". Hamish is in Isle of Skye and David sports the Williams tartan (Welsh).

A Thorfinn Tartan Snap Flap in Isle of Skye (L) and Gordon Modern

Mr. Bill of the Park City UT area designed this one to go with his rendezvous outfit

TCS #11 in Black Buffalo hide. Notice the pebble grain. Buffalo makes a great bag. It's strong and tough, yet very supple.
Deerskin body with MacTavish Flap.

Here's what will fit in there
This customer wanted a special pocket for his cigar case. He might even get a cigar cutter in the little pockets.

The black sporran on the left belongs to a "gentleman of substance", who wanted a sporran that doesn't make him look fat. Proportionality is the key to good kilting. To the right is the same sporran with its other flap.
Get creative! How about a fur flap? This one's in Nutria. What's that, you ask? Google it.
TCS 47. An unusual request from a repeat customer.

Black Buffalo in US Army Tartan

Mixing colors lets you wear whatever belt and shoes you want

Custom pocket for a Palm Treo, with slots for small accessories
TCS 33, made of hair-on Asian buffalo calf. A really lustrous hide.