must have aluminum core and v-score panels.
i've used several but problems of one or another with all.
thanks

 

We have been using these guys are work lately and are quite happy with them..
https://www.mclpcb.com/
We get the boards from their China location but always just deal with the local guys in the US
They have gone above and beyond on many occasions..

 

Why don't you list the ones you have crossed off the list so we don't post needlessly?!!
Max.

 

HW electronics
Seeed/Fusion
allpcb
several others i can't remember.
most don't have panel/v-score capability.
some with good quality try to rob you on shipping.
some demand TT payment which costs $50 just to process. i prefer paypal, quick and easy.
i prefer china direct, the US suppliers just buy them from china and mark em up.
i used to have a good US maker but they closed shop.

 

What do you mean by "high volume" - 1000, 5000, 50 thousand?

[EDIT] - any board house without V-groove scoring capability is Mickey Mouse by today's standards (actually by the standards of at least a decade ago), however metal core is outside of the ability of some good manufacturers.

 

I haven't had boards fabbed for quite some time, buy I was always satisfied with Advanced Circuits. I don't know if they do metal core. Here is their capabilities page.

https://www.4pcb.com/Advanced-Circuits-PCB-Capabilities-12-1-15.pdf