From what I understand you're supposed to build it but third party companies sell some already assembled.

nostr:nprofile1qqstrcgctzz2d52thl8r3xwt205pswkauep0yexsla83w3fhrcrpxnqprpmhxue69uhhqun9d45h2mfwwpexjmtpdshxuet5xp62jx is where i got both of mine