Jaspers fuel tanks?

[Kjell Lindberg]

Seen this before?

I tried to find info on the web, without any luck.

Jaspers long range fuel tank

[Snaphappy]

I've found this but their website is being redone and no mention of bike parts.

Google link comment:-
Die Firma Jasper fertigt für die verschiedensten Bereiche der Wirtschaft .... GESPANNBAU, SCOOTER, BEIWAGEN, MOTORRÄDER, TANKS, ROLLER, MOTORRADTANK, ...

and the website Josef Jasper GmbH & Co. KG