There are some great hose options that will work perfectly, but I believe you can use AN fittings with the Holley pumps I mentioned along with most othfer low pressure pumps. Same with the regulators, no problem using AN type fittings.
Tahe your system or bike to someone local who is good with this, tell them what you're after and let them advise you what to do and use. Too amy people telling you what to do and/or what parts to use is a recipe for disaster. Find your best most knowledgable person who has successful experience with nitrous in
your application and stick with him. Everyone means well, but there are too many different opinions and approaches, some of which are not very compatible with each other even though they work well by themselves. Hopefully this is making sense.
Chris, you always seem to have the best well engineered set-ups that produce or surpass the desired results, stick with what has worked for you in the past as far as how you put it all together.