Hi Stevemac,
This one a pretty tough search :) I manged to find just 1 dropshipper with bite alarms, however they are located in the US -
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I did an off site search and found additional suppliers based in the UK that has bite alarms, although I cannot verify if they dropship.
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Also please note that we cannot vouch for these suppliers as we have not used them before.
Hope this helps, all the best!