Elrog 300B vs Takatsuki 300B tubes

Interesting read regarding the Elrog ER 300b.
Where does one order a pair?
How much is a pair?
I recall reading a while ago they were on back order (but I forget from where) is that still the case?
Thanks for any assistance.

Lak,
They're 1099.00 USD pair. I bought mine at tubesusa.com. Demand seems greater than the current supply at this time.
Charles,

My recently acquired Elrog 300B replaces Psvane WE101D replica on Lampizator Big7 as output tube (Big7 has a switch to take either lower current or higher current tubes).

Initial impressions are very positive. Right now it is not as refined as 101D but it dwarfs 101D in every other areas. Sound stage expands dramatically; more details (and 101D was reported to be utterly detailed on Big7); better depths (but filled with information) and more holographic; more sense of realism on vocal.

I suppose that it needs burn-in to be more refined. Also my system needs tweaking. But certain details and depths already show how capable Elrog is. I am looking forward to trying them on tube amps sooner.

Thanks again to Charles and fellows for all the inputs. :)

Wyan001,
That's an interesting comparison of those two very different tubes. I use the W.E. Replica 101D in my line stage and it's superb in that function. It's a thrill having both of these tubes in the same signal path working together.
Charles,

I have Lampizator Big 7 as well. But I use 45s, the best of them, Cunningham, and then the best of that.
Please keep us posted how it develops. Have you tried any other tubes on Lampi Big 7, including any other 300Bs?

Just as Charles1dad I upgraded to PSvane 101D WE Replica on the same line stage. Worth the extra 300 over the stock tubes for sure.