Search service for Russian-language books for Kindle

After I got Kindle 3, the problem of filling it with books in all of us understood Russian became a problem. The book itself supports the Cyrillic alphabet from the box, but the Russian layout is not provided in it. An excellent opportunity to use the browser built into the book partially suffers due to the lack of a Russian layout.
Of course, it is possible to use firmware hacks to localize the device, but this is not always convenient, since when updating the firmware these hacks will have to be rolled back, in addition, we may lose the guarantee. It’s also not convenient to connect a book through a USB cable constantly via USB, because why in the end is WiFi and 3G in it? A way out of this situation may be a Russified on-screen keyboard.
In one evening, a suitable on-screen keyboard was written in JavaScript and optimized for the Kindle screen. The kin3lib.ru domain name for our project is registered . The service throws the search request typed on the virtual keyboard into the library of Flibust , where you can then calmly download the book in its native mobi format. In the future, you can implement the choice of libraries on which to search, but, unfortunately, I found only one that allows you to download books in mobi format. If anyone else knows such libraries, write to me.
I will be pleased to hear the opinions of the residents of such a service, as well as who and how to solve this problem.