While it's not homebrew, I picked up this stand off from Lowe's for $25.
http://www.lowes.com/pd_98178-287-AC96_4294858111_4294937087_?productId=3048127&Ns=p_product_prd_lis_ord_nbr|0||p_product_qty_sales_dollar|1&pl=1¤tURL=%2Fpl_Ladder%2Band%2BScaffolding%2BAccessories_4294858111_4294937087_%3FNs%3Dp_product_prd_lis_ord_nbr|0||p_product_qty_sales_dollar|1&facetInfo=
It gives 10" of distance from the wall and the length is between three and four feet. I like it a lot.
http://www.lowes.com/pd_98178-287-AC96_4294858111_4294937087_?productId=3048127&Ns=p_product_prd_lis_ord_nbr|0||p_product_qty_sales_dollar|1&pl=1¤tURL=%2Fpl_Ladder%2Band%2BScaffolding%2BAccessories_4294858111_4294937087_%3FNs%3Dp_product_prd_lis_ord_nbr|0||p_product_qty_sales_dollar|1&facetInfo=
It gives 10" of distance from the wall and the length is between three and four feet. I like it a lot.