Looking for a русский keyboard. Need keyboard with only Russian cyrillic letters

Can't use bilingual keyboard if I can help it. I am taking Russian language class at school. Have taken only 5 classes so far. Would like to buy USB keyboard from Russia with only Cyrillic letters if possible. Having English letters makes it confusing. Can not find Russian store that sells the keyboard I want. I tried to sign up at the Russian LOCO forum, but they use 2 sneaky phrase boxes and I don't know how to answer them. Since I'm a member here, here I am.

Can anybody help. I will buy from US if I have to, but buying from Russia would really be neat. Thank you.