I found plastic tubes locally also, had them cut into 3' lengths, I then drilled them and stuck cotter keys (auto parts supply) thru them and they work like orginal only still very clear. On internet I found and ordered one ten foot piece 1.25 I.D. CLEAR sch. 40 PVC. Had them cut it 4'/6' and ship UPS. Haven't yet but intend to cut in ether 10" or 12" lenghts, turn I.D. 1.375 for approx. 1" and slightly bevel I.D. on other (for cap) and replace feeder tube on a couple of powder magazines. Little concerned about static but will watch carefully and proceed slowly. The case tubes work fine up thru 45 ACP, what do you use for 44 Mag.? Is there a guide for which Hulme feeder block (correct terminology?) to use for each caliber?