ZINUS 9 Inch Smart Metal Box Spring / Mattress Foundation / Strong Metal Frame / Easy Assembly, Twin 4.6 out of 5 stars 53,262 $90.62 - $387.45 source https://www.amazon.com/Mattress-Foundation-structure-assembly-required/dp/B00NPVCNS8/ref=zg_bs_1063306_14/133-8784516-4303511?_encoding=UTF8&psc=1&refRID=CRAWTCE6TDPB34X4MFV0
