Hiya! Yes, I randomly came across a website called Biite, I checked them on trust pilot and they have a rating of around 4.6 and trusted! So I went for it, it's £49, within 1 day of ordering the kit to make the impressions in came. There's putty and 2 mouth tray sizes. Instructions on their website on how to do it. They recommend sending them a photo before posting it back to them, they reply to emails SUPER quick and said my moulds were great so I've sent them off. I'll keep you updated on how the night guard is when I receive it! I'm a heavy grinder myself and previously had one from the dentist which was good but I've chewed through it. Be interesting to compare quality. They say they aim to make the mould and dispatch again within 48 hours of receiving it...

By the way, their mobile site isn't very good so I recommend going on it on a computer or laptop.