Looking for a tube preamp with remote control.

I love my Cary SLP-05 tube preamp. It is built like a tank.  It has full remote. 

Love my Quicksilver. It's not as pricy as some of the other very good suggestions here (Sachs, Atmasphere) but this would be a low-cost experiment: https://www.usaudiomart.com/details/649756290-quicksilver-remote-linestage-dj8/

You could probably offer $600 and then buy some really nice tubes to roll in and out, as well as a good power cord.

Thanks for all the suggestions.
I’m now leaning towards the Placette passive remote control.
It allows me to use my current preamp which I love, and comes in under budget.

It’s against purist thought, but I assure you, over the years, in and out of several systems, neither I, nor any of my friends can tell if this wonderful remote line controller is in or out of the system.

Throughout covid, at home, I've refreshed, upgraded, my system is more revealing than ever. I just put it thru the in/out test again (it's hard to believe) and I'm keeping it in, getting all of it's features benefits.

https://www.ebay.com/itm/124899959382?hash=item1d149e2256:g:oJUAAOSwl9BhQB7j

remote source switching, volume, and balance, and this one has the switched power outlet, some versions lack that. it also has built-in fletcher munson ’loudness’ for low level listening, primarily maintaining bass which maintains involvement at those low levels for me.

you need the remote, no front panel switches.

try it: love it, keep your existing preamp (I run my McIntosh mx110z tube tuner/preamp thru mine), and save a lotta $, buy a whole lotta music!

try it, nah, sell it, you won’t lose much or might actually make some if you wait till no others are for sale, which happens frequently.

New, Used, they either work or they don’t, I have 3 (2 active, 1 spare), gave 1 to a friend. I did receive one broken. turns out it had been poorly packed and dropped hard enough that the transformer broke a solder connection, got my money back.

I would be interested in hearing what your impressions are after you have implemented it and listened for a while. As Elliott pointed out this violates the  fundamental principle of introducing no extra functions in the signal path. I tried a high end manual switch box about 40 years ago… that had big negative impact on the sound. Be interested to hear if the technology has improved.