Hey Brian,
Can't really help ya much.
www.bollyprops.com is the North American web. site. If you do happen to come across a prop. for your 1.8 that cuts "bread n' butter" above the rest, let me know please.
I've used some of the clubman series on my .46-.52's with excellent results, They're my prop of choice. I would like to try others on other engines, but Bolly's have been somewhat difficult find. Apparently, the fellow who used to import them live's in the town around the corner from me and stock was very limited. Now, I believe thats changed hand's and they seem to be promoting the product up here. Anyways, check the web site out if you haven't already. Happy Fly'n....