Anyone know asource for 4-ohm Lpads?

I'm finishing a passive crossover design for a client who provided 4-ohm drivers but I'm having a hard time locating a 4-ohm Lpad for the Hi Freq leg. Willy's HiFi in the UK lists them, but they've been out of stock for months now in both the 50 Watt and 100 Watt varieties.Does anyone know another source for them? I know you can "hotwire" a couple of 8-ohm ones to make a 4-ohm one, but that's bulky and twice as expensive.