I've found a lokal store in Gothenburgh which sells Tilt switches for a reasonable price.
" Mfr. Assemtech
Hermetic metal encapsulated gas filled switch for applications where indication of the tilt angle or movement is required. The switch, which does NOT contain mercury but instead a gold plated ball can replace mercury switches in many applications.
Max angle
on: 15° under horizontal line
off: 15° over horizontal line
Max breaking capacity: 250 mA 60 Vac/dc, 3VA
Max contact resistance: 30 Ω
Temp. range: −40 to +150 °C
Dim cover: Æ4.7×L10 mm
Dim connections: Æ0.5×L12 mm "
1 = 5.24 SEK + VAT per peice
10 = 4.19 SEK + VAT per peice
30 = 3.56 SEK + VAT per peice
So if 10 people order then that would mean that it would only cost 75 cents/ 0.4 £ (VAT included) a peice +plus shipping.
Any interest?
**EDIT**
By the way.. the stores homepage it www.efla.se and IT CAN be view in english. just look at the upper right corner and you should se a bunch of flags to click on.