ive dumped the triumph tank bra in favour of a custom BIG pocket tank bra from a shop in Canada:
Its pocket is BIG - easily holds couple packets of mints, couple pairs of glasses, smokes, cellphone, wallet, and other items. If your interested let me know and I will pm you the guys details.
The makers of my tank bib are Talisman Saddlebags in Ontario Canada (http://www.saddlebagsbytalisman.com/). The cost is $125CA for the oversized pocket version (which you can see in the picture) plus shipping (it was $35CA to ship to the UK).
If you order one ask for Scott and mention my name (Leigh Gardner) so he knows which one your after - he also did one for the Rocket III Touring version until I pointed out that I didnt have that version
I cant rate these highly enough - I had one on my Valk and just had to have one for the Rocket3 (it deserves no less)!