Recommending Greatbear in Bristol - they have all the gear for 1/4", 1" and audio on Betamax, and do a lovely job...
https://thegreatbear.net/project/quarter-inch-reel-to-reel/
https://thegreatbear.net/project/1-inch-multitrack/
https://thegreatbear.net/project/pcm-audio-on-video-tape/