I do not know if Amsoil makes one or not, but K&N definitly does. I bought the K&N at Autozone for my 1992 last year. They did not stock it in the store at that time,but promised delivery in two days. They thought it was in stock at their warehouse about 100 miles away but it was not and they picked up the two day air shipping cost from K&N's factory in California.
I do not remember the part number and I just went out to the garage to see if I had kept the box, but I did not find it.
The price when I bought mine was about $63. 00-$65. 00.
Hope this helps!
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92 D250 Auto Trans-Currently stock except for TCI special torque convertor. Now adding 16cm turbo housing, complete 4" exhaust, tachometer, pyrometer, and transmission temperature gauge. Injectors in the near future.
Also have 1984 Volvo D260 with inline 6 diesel made by Volkswagen.