For swap: 4-6 person shelter (new). Wanted: silnylon tarp or poncho-tarp.

[BigMonster]

I have Rab 4-6 person bothy shelter (mine have OutdoorDesigns logo) bought from Cotswold this summer:
http://www.cotswoldoutdoor.com/rab-4-6-person-shelter-76110049?id_colour=157
Played with it a little but never used in the elements.

I'm after a small silnylon tarp or poncho/tarp.
FE:
https://www.cotswoldoutdoor.com/rab-siltarp-1-77110059?id_colour=122
http://www.ultralightoutdoorgear.co...-shelters-c25/tarps-c43/poncho-tarp-sul-p1573