@Vivek Batra
Are there any special requirements to drive these speakers?
Specs wise they seem to lend themselves to low power amps (tubes included).
Apart from Lyrita, there are a bunch of FMs who dabble quite a bit in tube amp DIY.
Maybe you can borrow something to insert into your rig and get a feel for the overall sound.
The brands on your radar are difficult to source in India.
From abroad, it will entail customs, etc.
Widen the search, consider local & used. Look at mass market pre/power combos too.
Cheers,
Raghu