I got some extra Hydrocotyle sp. 'Japan', they are really pretty green clover plants. They make great carpets and mid bushy plants.
They grow stems like pennywort, but horizontally instead of vertically, which is why they make really nice carpet.
$1 per stem (which totals about 5-8 nodes) (have about 35 stems)
Shipping is $6.50 for priority shipping
when you get the stems, just cut them up by sections and plant them into the substrate. It will grow into a very pretty lawn, especially if you press it down every week to make them grow more compacted.