yeah if they are doing flat c7 for bubble light replacements id also like to see pics and costs for U.K.
Not sure what flat top c7 look like.
In the C7 bubble light I have relamped there were,
s6 shape our t4 shape bulbs with a e 12 base 120 volt 6 watt
I have relamped most styles of bubble lights. there are a few I do not have, some of the rare ones .
The only flat top bubble light bulb I know of was for the c6 light string it had a e10 base 15 volt 5 watt bulb
these were made by GE and used in the noma,royal, usa, reliant band c6 light strings
Paramount used a globe shaped bulb in there bubble lights in there sauser c6 light not sure what the latter
style use I do not have any yet