FRANKOla

Hello all. I am new to the site. A friend asked me to look at his Carver m500t amp, which he said had a weak left channel. I worked the input jacks a little bit and anyway the channels are fine, equal and strong..(I suspect his preamp may have issues) However, both of the lamps are dead. Is there a good source for stock, not LED, lamps for this unit? It looks like I just need to splice in the new lamp and reuse the rubber cover? Thanks in advance.