It wouldn't sell in any meaningful quantities,
And Company's are looking to buy consumer grade electronics more so than paying for custom grade because the advancements in the consumer front happen so quickly yearly replacements are cheaper than buying custom every 3 years.
I would certainly appreciate a Bold 9000 with the 9900 specs, sporting 2 x LS1 - 1230mAh batteries with the added space in the 9000, they could have the second SIM, and more antenna, I'd like to see the inclusion of MicroHDMI, and BT4 on the device as well,
I'd pay in the $900 range for it.
Reason for 2 smaller batteries is rapid charging a single battery while keeping the device going, and being able to carry smaller spares.
Would not sell in quantities enough to justify the R&D and production of the device IMHO. RIM simply isn't in a position address that small of a niche product at this time.