How hard is it to find a decent alarm bellbox?

Hi all, I have tried to find a good bellbox for my alarm, I have tried all the texecom odyssey ranges but the piezos just fail straight away or the next day after, no good, I have also tried the flashguard xl and they are not cheap £50+ and same result the piezos pack in or the strobe fails,getting annoyed now!.

So I tried the novagard range because I see the professionals use them as they do with the above bellboxes apparently. The piezos on it worked for a change but the strobe is rubbish during the day (its an led strobe for some reason) I thought it would of been a xenon tube.

I have tried to stay away from the crap bellboxes such as reason8, sonade ect and stuff like that,I have found out these so called "professional high end quality brands" are just as bad.

Any help would be deeply appreciated from a pro alarm engineer. thanks