I'd like to fill some needs by using augments on some items, this way I can save some item slots. For example, featherfall is something that I'd like as augment, as well as some skill diamonds.

The problem is: I simply can't get my hands on augments.
I have lots of pp, but no astral shard. And I don't want to spend more real money on shards just to be able to buy augments. I can't even find gianthold relics on AH anymore, so I can't buy them directly from gianthold traders.

So, what's the easiest way to get augments, considering I have enough pp, but no astral shards? Any way to convert pp to shards, for example?
(Specially diamonds of skill, topaz of featherfall, sapphire of good luck, topaz of spell focus)