Try asking one of the local under 10's if he wants to earn some pocket money...Give him a £1 for each black bin sack he brings in of clean moss...I get mine from the next door neighbour...He is happy for me to rake his lawn...It takes me 10 mins to get a huge pile, enough for all our wreaths...Then there is the local golf course...They rake moss out all year round, go and ask one of the groundsmen...No need to spend a huge amount on it....