You have a couple of options. First is the oil cooler. You can try sourcing it from other suppliers such as Pegasus Racing, their 13 row cooler is $134 or you can use an old MGB cooler. A lot of people won't consider a used cooler, but my take is that if you flush it well and install it so that the oil returning to the engine from the cooler then passes through the filter any particles will be caught by the filter. I've had mine installed in this way for 10 years without any problems.
As for the fittings and hoses, remove your existing fittings from the engine and take them to your local hydraulic supply shop, they should be able to fix you up with adaptors and JIC fittings with low pressure hydraulic hose at a very reasonable price. The low pressure hose is designed for a push on barbed fitting and won't blow off at the pressures you see in an engine oil system and are much less expensive than the AN fittings and braided hose. You may have to have the fittings for the cooler itself crimped on at their shop as those fittings may not be available in the barbed design, still no problem. I bought about 6 feet of hose and had the cooler fittings crimped on both ends, then I installed it in the car and cut the hose to length in the middle and used the slip on fittings there. I highly recommend fitting a thermostat in the system as well. You can get a good thermostat that uses JIC fittings or adaptors for around $80 or less depending on where you shop. You'll still have around $150 in the system even if you use an old B cooler, usually less than $30 at swap meets or such. That's about the cheapest way I know to get a good oil cooler system for your car. Takes some effort but worth it in my opinion.