I think I can cover this pretty well:
Any of the furniture there which is described as being for stamped AKs will fit your SAR1. Keep in mind that all AK furniture requires some fitting to individual guns, but it's almost never hard with even very basic tools.
The easiest way to attach a 74 brake would be to get the AK-USA (AK-103.com) adapter (they have one specifically for Romanian barrels) and their US-made copy of the brake and do it that way. You would still need to permanently attach the brake to the threaded adaptor, but I have no idea as to your capabilities in that area.
Pick a color you like best in the synthetic furniture and go with it.
www.ak-103.comGo to the gallery and you will find tons of picture of AKs with all sorts of furniture for reference. The brake and adaptor are in the parts section.