You can buy Palomar amplifiers wherever Palomar amplifiers are sold.
I have been using a PALOMAR 250 YELLOW FACED AMP purchased from COPPER for the past eight years with NO problems at all, works as advertised!! "MR DOUG" OR " BONE HEAD" WAS INFORMED OF THAT A FEW DAYS AGO! Do not think copper still sells them but H & Y DOES!!!!!!!