New Plants arriving sooner then media

[neper]

Hi Friends,
I am in need of advise right now, I ordered some plants and they are on the way, I ordered, D. Adelaea, D. Madagasceriensis, D. Curviscapa, Venus fly Trap Clone K1, Sarracenia Hybrid, plants will arrive in next 4 days. I ordered sphagnumm moss from other seller but now due to some problem of shipping it will take atleast a week before it will arrive. Now earlier i was using this ready-mix of Irish peat moss perlite vermiculite in equal amount,
but since it was showing 100+ppm of tds i shifted to using sphagnum moss. Now its sure that plants will arrive earlier then the media, what should i do
if plants arrive early, should i pot them in the ready mix till i get the sphagnumm moss or i should let them sit bare root for extra 4-5 days.
please advise

thanks