have a look round the `party` threads on this site
cant help with numbers,but if memory serves then i think that the systems-Antimatter,Circus Normal,techno as fuk,Technonotice and Bassik are all from Bristol or there abouts.so gives ya a few places to start lookin.
Oh …not sure if all yhe above systems still operate or not.
Happy birthday when it comes..have a good un. 🙂