have got a older  ( hardly used ! )  flamma  bi pot chemical toilet 

but when took it out the shed  discovered that the seat and lid has perished  to the point of falling apart 

have contacted a few   caravan parts suppliers   ( ebay , web  )  but  the only ones that seem to have the parts are in england  a bit far  away and a bit pricey

its the lid and seat that have gone 

so just wondering   

a        has anyone seen  some one that sells parts

b        is it worth  trying to   repair it 

c        what would be a good portable replacement  ( seen some in  big w  . etc )