I'll place this request with Dave.. and see if we can do this.. could you provide the frequencies your talking about..
The only ZLA frequencies that interact directly with L30 airspace are:134.65
(sector 6 low, Southwest to SoCal), 124.85
(Sector 8 low, Southeast to ZAB),124.2
(Sector 7 low, Northeast to ZDV/ZLC,) and 124.62
(Sector 16 low/high, Northwest to NorCal).
Everything else doesn't really hand off directly to L30 or receives handoffs from L30.