Space Cruiser Satania is a sci-fi model by Shunichi Makino who also makes model of Rens Head series and many more. Satania is based on Uchu junyokan satania-go kakaku, a 1979 sci-fi light novel.
This model is however not free but the good thing about it is that we non-Japanese people can buy it directly from Shunichi on internet. He sells it at the price of 1000 yen which is around $10 and you will get Satania in pdf file with 7 parts pages.
You may buy this model Here using paypal .