Slimmest pyrex cartotank that I know of are the new Skinny Phinny's from Phiniac (not locking):
The Skinny Phinny - Phiniac Glass
Smoktech "Skinny" EGO
tank is same diameter as an eGo, but requires the longer Smoktech cartomizers.
http://www.vaporbeast.com/product_p/c34.htm
The 3.5ml polypro DCT
tank tubes (require an XL Boge, not standard length) are only $ 8.50 each. Slightly larger diameter than the eGo battery, but would look great with an eGo cone
WIDE eGo Cone Cover for DCTank. (not locking).
Pro DCTank Tube
The 510 U-DCTank 3 ml Mini is a locking tank, however, for the locking feature to work the cartos must have a flange on them like Smoktech cartos. Most Boge cartos do NOT have a flange if I'm not mistaken. Perhaps someone who owns these tanks can add more insight.
510 U-DCTank Combo - 3ml/Mini
IBTanked makes a 19mm diameter pyrex cartotank ($25 for complete kit). The standard length tank could take a standard length Boge, but the XL length tank would require either a XL Boge or Smoktech carto. Also would look nice with an eGo cone cover.
IBTanked - Get Tanked With Us!
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How to match cartos to tank length.
I've given you some reference resources. You'll need to research more to see which best suits your expectations.