Small 3g/4g USB modem for Surface

[Stinomus]

I'm after a small USB 3g (4g is a bonus) modem for my Surface Pro 2, can be any SIM size. The ones I've seen are all quite large and bulky like the USB flash drives of the early 2000s. Anybody know of anything smaller?

 

[Rpgccv]

I was looking for the same and thought... "Why not a modem on sd slot"!!
... I found this: Huawei E2130 Ultrastick Wireless 3G SD Modem (........4gltemall.com/huawei-e2130-ultrastick-wireless-3g-sd-modem.html)
I did not find nothing similar and this is one year old; maybe does not interest the "market owners".