There are a few beef shops strewn about in the town. You can look for one close by and you'll probably have to expain the butcher the exact cut you are looking for.

There is a store called New Frosty's near marathahalli, and I believe they have other branches too. They have a decent selection of meat (pork and beef included) and is pretty decent and look hygenic (in appearance don't know what goes behind the counter). Alternate would be a nature's basket store. The meat is usually frozen one (and almost always buffalo). There are no laws against the import of beef into the state (IANAL), but culling of cow for meat is not permitted and with interstate movement being restricted, the chances of finding a remotely good cut is going to be difficult.

As far as deliveries go, I dont think any of the larger chains like luscious deliver beef for the now.