A few posts on various forums suggest that Skydd Oil was discontinued by Ikea in February.
Your criticism of the substitute that you purchased last time appears to be that it was too thin but googling finds plenty of references suggesting that it's the lower viscosity (i.e. thinner) oils that penetrate into wood best, indicating that they're actually the better type for your needs.
96% of reviewers rate this product as worth either 4 or 5 stars on Amazon, so perhaps it might be worth trying?
Amazon.co.uk User Recommendation