The Grämlins are also doing large scale tech deals, all on a 10 day basis.
The smallest deal we do is 600 tech (transfered on a single day every 10 days), the largest we got so far is 2000 tech (again, transfered on a single day).
It usually works best to split it into smaller parts (either 600 or 1200 tech for one day of transfer) for easier organisation.
Alliances interested can contact me with an ingame PM But be aware that while we pay a good price we also expect good service, meaning fast tech delivery (those transfers should really work on a single day, we are very proud on our aid slot efficiency and every day delay in a tech transfer results in wasted aid slot time).